package com.test.springboottest.component;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 登录检查，不登录其他页面不能直接访问
 *
 * @author liqingbo
 */
public class LoginHandlerInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断用户是否登录状态，如果是登陆可以访问，否则，提示没有权限,跳转到登录页面
        Object user = request.getSession().getAttribute("user");
        if (user == null) {
            //未登录
            request.setAttribute("msg", "没有权限，请先登录");
            request.getRequestDispatcher("/").forward(request, response);
            return false;
        } else {
            //已登录
            return true;
        }
    }
}
